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Validity and reliability of measurements of elbow flexion strength obtained from older adults using elastic bands
Brad Manor1, Robert Topp, Phil Page
1Department of Kinesiology, Louisiana State University, 112 Long Field House, Baton Rouge, LA 70803, USA. bmanor1 @lsu.edu
Purpose:
This study determined the validity and reliability of measurements of elbow flexion strength obtained from older adults using elastic bands.
Methods:
Forty-eight community-dwelling older adults with documented functional limitations completed 3 assessments of elbow flexion strength: a 30-second test using elastic bands to generate resistance, a similar test using dumbbells, and a test using an isokinetic dynamometer. One week later, subjects repeated the 30-second elbow flexion test using elastic bands.
Results:
The 30-second elbow flexion test using elastic bands was significantly correlated with both the 30-second elbow flexion test using dumbbells (r = 0.62, P < 0.01 ) and the maximum isokinetic torque of the elbow flexors (r = 0.46, P < 0.01 ). The 30-second elbow flexion test using elastic bands demonstrated a high degree of test-retest reliability (intraclass correlation coefficient = 0.89, P < 0.01 ).
Conclusion:
The validity and reliability elbow flexion strength measured with elastic bands supports its use among functionally limited elders.
